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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Animals which have many estrous periods per year (ex: cow - sow)






2. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






3. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






4. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






5. 265-285 days






6. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






7. Why does estrus happen before ovulation?






8. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






9. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






10. 45-60 days after breeding; re-breed as required






11. Depository for semen during insemination. where urine leaves the body






12. Animal which has been castrated after puberty






13. Implies the amount of estrogen production






14. Animals which have many estrous periods per year (ex: cow - sow)






15. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






16. (switzerland) 2nd in size and milk production - most muscle -






17. (FSH) causes egg to mature in females






18. Days which have increasing daylight hours

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19. Start of the reproductive tract for the female. located outside of the body






20. Sperm production






21. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






22. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






23. 1-2 days






24. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






25. 19-23 (21) days






26. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






27. (male) pushes the testes outward toward the legs for a cool-down off of the body






28. (LH) stimulates the Leydig cells to produce testosterone






29. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






30. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






31. Luteolysis happens because of the ____________ hormone






32. To remove/separate testicles from animal's body before animal reaches puberty






33. Help to signal hormone levels which we need both in the brain right next to each other.






34. Why does estrus happen before ovulation?






35. Can survive ~7 days in cow. vast majority <48 hours






36. ~60 days before calving






37. Actual heat cycle (period)






38. To remove/separate testicles from animal's body before animal reaches puberty






39. What about the sperm for a bull which has been castrated but still has testicles?






40. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






41. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






42. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






43. 30-38 hours after estrus cycle begins






44. Urinary calculi.






45. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






46. Failure to have both testis (gonads) descend






47. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






48. Front feet and head first. (except for hogs and dogs)






49. Allows extension of penis without fibro-elastic penis






50. Animals which have only one estrous cycle (ex: dog - fox)